Tool-holder for grindstones



(No Model.) 2 Sheets-Sheet 1.

J. I. CARE.

TOOL HOLDER FOR GRINDSTONES- No.352,037. PatentedNov. 2, 1886.

N. PETERS Plmlo-L'xlhagraphar. Wanhingtnn. n c,

' (No Model.) 2 Sheets-Sheet 2.

J. I. CARR.-

TOOL HOLDER FOR GRINDSTONES.

UNITED STATES PATENT OFFICE.

JOHN I. CARR, OFOHICAGQ, ILLINOIS.

TOOL-HOLDER FOR GRINDSTONES.

SPECIFICATION forming part of Letters Patent No. 352,037, dated November2, 1886 Application filed February 9 1886. Serial No..191,l88. (Nomodel.)

To all whom it may concern.-

Be it known that 1, JOHN I. CARE, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inSupplemental Tool-Holders for Grindstones, of which the following, inconnection with the accompanying drawings, is aspecification. v

The purpose of myinvention is to extend the capacity or usefulness oftool-holders for grindstones. To that end I employ a supple mentalholder or device adapted to be used in conjunction with tool-holders ofthe class referred to; and myinvention consists in certain novelfeatures of construction, hereinafter set forth in my claims, and whichI will now proceed to describe with sufficient particularity to enablethose skilled in the art to appl my invention to use.

In the drawings, Figure 1 is.a side view of a tool-holder illustrativeof my improvements, showing the manner in which the same is applied touse. Fig. 2 is a top view of my improved supplemental holder, enlarged,and representing so much of atool-holder for grindstones as maybenecessary to further show the manner of applying the supplemental holderto the holder proper. Fig. 3 is a side view of the supplemental holderdetached. Fig;

4 is a side view of my supplemental holder, represented in connectionwith a tool-holder different from that shown in Fig. 1, the supplementalholder being in the reverse position from that shown in the figurelastreferred to. Fig. 5 is a detail, enlarged, the same being a top view ofthe single or larger jaw of the supplemental holder,and showing itsrelation to the holder proper; andFig. 6 is a detail of one of thesmaller jaws.

Like letters of reference indicate like parts.

Arepresents a grindstone, andB is its frame or support.

O is atool-holder for grindstones. The holder 0 shown in Fig. 1 issubstantially the same as that shown and described in Letters Patent ofthe United States of America No.

277,958, granted to George H. Strong and myself the 22d day of May,1883, for the improvementstherein set forth, and the. holder 0 showniir'Fig. 4 is substantially'the same as that shown and describedin'Letters Patent of the United States of America No. 277,883, andgranted to me the 22d day of May, 1883, for the improvements therein setforth. I need not, therefore, here describe either of the saidtool-holders with particularity. A feature of construction common toboth of the said toolholders is, that each has a clamp, D, for holdingthe tool firmlywhile it is being ground. In each of the said holdersprovision is also made for presenting the tool to the stone at differentangles or inclinations, according to a comparatively small clamp, 12 b,and at its central portion a comparatively large clasp, c. The clamps bb consist of rigid horizontal extensions d dand of set-screws e e,entering and passing through the upper ones of these extensions. Thelower extensions, d d, are inclined, being highest at their outer endsor edges, and are arranged directly underneath the lower ends of thescrews e 6, all of which is clearly shown in Figs. 3 and 6.

plate, f, extending rigidly from the central part of the bar 6 in adirection opposite from that in which the parts (1 d extend, and of aplate, g, corresponding, in form to the plate The clasp 0 consists of acomparatively broad and flat part or drops a little near itsclamping-edge and then inclines upward, and the corresponding end of theplate 9 is formed to clamp the tool downupon the inclined or upturnedpart of the plate f.

In Fig. 6 I have shown a pivoted plate, j, arranged on the lowerextension, d, for the purpose of adapting the clamps b b to fit the toolnicely; but the plate 9' is not essential.

To use my supplemental holder for the purpose for which it is intended,I arrange it in the clamp D of any tool-holder for grindstones capableof receiving it, and make it fast there in the same manner that toolsare secured therein for being ground-for example, as shown in Figs. 1and 4. To grind a drawshave, E, I place it in the clamps b b, asindicated inFig. 2. It will be perceived that the whole cutting-edge isexposed between the said clamps, and that the back edge is for an equaldistance exposed and out of contact with the holder. The tool to besharpened stands far from the holder 0, and is also so exposed in thesupplemental holder as to be capable of being ground from its rear edgeto its front or cutting edge as well as along the entire length of thelatter edge. Draw-shaves of different sizes may thus be firmlyheld forbeing ground, and the work may be done without obstruction being offeredby any part of the toolholder. The tool to be ground may be also flatlypresented to the, stone. The supplemental holder may also be so clampedby the holder proper that the tool to be ground will be a greater orless distance from the top of the stone, as may be desired, thus varyingthe bevel on that side of the tool in contact with the stone, and thetool'holder is not liable to strike the stone at any time. The toolwhich is being ground can also be adjusted endwise in the clamps b b,and also adjusted laterally by moving the clamp D (shown in Fig. 1)laterally on its supporting-rod F, as described in the said LettersPatent N 0. 277,958, so that any length of shave may be ground withoutchanging the bevel.

The clasp cis intended to hold such articles ascase-knives, F, Figs. 4and 5. To use this part of the supplemental holder it is so arranged inthe holder proper that the plate 9 will be clamped down upon the knifeor other article, the knife or other article being first arrangedbetween the plates f and g. It will be perceived, on reference to Fig.4, that the knife will be held down quite flatly against 'the stone, andthat its entire cutting-edge (see Fig. 5) will be exposed for beingground, only a comparatively small part of the back of the knife beingheld in the clasp. To grind the blades of scissors and like articlesrequiring a very short or narrow bevel,I reverse the supplementalholder, or turn it over so that the plate f will be uppermost, thuspresenting the blade to be ground to the stone at a considerable angleor inclination thereto.

In using either part of the supplemental holder, I also make use of theholder proper in any way that will be of advantage.

It will now be perceived that the supplemental holder adds greatly tothe usefulness of the holder, or extends its capacity for usefulness byincreasing the range of work. I do not, therefore, here intend torestrict myself to the combination of a supplemental holder with anyparticularholder proper. Neither do I intend to restrict myself to allthe details of construction shown and described relating to thesupplemental holder; but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A supplemental tool-holder for tool-holders for grindstones, the saidsupplemental holder having branching or diverging arms a a, adapted ator near their junction to be clamped by the tool-holder proper, and theouter end ofeach of the said arms having thereon a clamp for clampingthe tool to be ground, and the said arm also havingthereon a centralclamp extending in an opposite direction from the said two clamps,substantially as and for the purposes specified.

2. A supplemental tool'holder for tool-holders for grindstones, the saidsupplemental holder having branching or diverging arms a a, the saidarms having on their outer ends the clamps b I), having inclined lowerjaws, and the said arms being also adapted to be clamped at or neartheirjunction by the toolholder proper, substantially as and for thepurposes specified.

3. As a new article of manufacture, a supplemental tool-holder fortool-holders for grindstones, the said supplemental holder havingtherein two clamps arranged apart from each other upon a bar connectingthem, and the said bar having thereon a central clasp, 0, consisting ofthe fixed plate f and the hinged plate 9, extending in the oppositedirection from the said clamps, substantially as and for the purposesspecified.

In testimony that I claim the foregoing as my own I hereunto affix mysignature in presence of two witnesses.

JOHN I. CARR.

lVitnesses: V

F. F. WARNER, H. S. BURKI-IARDT.

